Table 1:

Log of the observations^a.

Date	Days to				Alpha	Sun-C	Telescope	D	Filters	Exposure
2008-2009	perihelion	(AU)	(AU)		()	PA ()		( km px-1)		time
December
25.60	-65	1.67	1.45	14.2	35.75	70.5		370	CR	180 s
26.62	-64	1.67	1.46	14.2	35.75	70.5	IGO	373	CR	120 s 2
27.59	-63	1.67	1.46	14.2	35.8	70.4	(India)	373	CB	240 s 2
27.61	-63	1.67	1.46	14.2	35.8	70.3	2 m	373	CR	180 s 2
27.63	-63	1.67	1.46	14.2	35.8	70.3		373		60 s 2
March
17.81	+17	1.72	1.26	13.5	34.7	69.9	OHP	1051	R	20 s 9
18.78	+18	1.72	1.265	13.5	34.7	70.0	(France)	1057	R	20 s 18
19.80	+19	1.73	1.27	13.5	34.6	70.2	0.8m	1057	R	20 s 21
April-May
30.60	+61	1.99	1.44	14.5	28.9	82.3	IGO	445	R	360 s
01.70	+62	2.00	1.45	14.5	28.7	82.7	2 m	445	R	600 s

Notes. ^(a)  = Earth-comet distance; = Sun-comet distance; = expected magnitudes given by the JPL Horizons system ephemeris; = phase angle; Sun-C PA = extended Sun-comet radius vector position angle; D = projected diameter for 1 pixel; filters: CR = narrow cometary red filter, CB = narrow cometary blue filter, = broad red filter centered on 620 nm, R = broad red filter centered on 650 nm (see Sect. 2.1). Exposure time for each polarized component image number of images used for the results.